From patchwork Sun Mar 19 01:56:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13180188 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CC0BC76196 for ; Sun, 19 Mar 2023 01:57:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229944AbjCSB5A (ORCPT ); Sat, 18 Mar 2023 21:57:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229841AbjCSB4x (ORCPT ); Sat, 18 Mar 2023 21:56:53 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D93A23136; Sat, 18 Mar 2023 18:56:47 -0700 (PDT) Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32J18Q7v002689; Sun, 19 Mar 2023 01:56:36 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2022-7-12; bh=ISUq+MN63A7B6PSmlAC3g/PRg+2OJeKDRhGTqTC8+qo=; b=SUIC0WfHgZUmX0zggyzCEmrZqA2N/zIee3Xdjat7WcQkkvMlE8GGdedMScewtfc8I3bH fLwvaYS1SJ/J04B4n2/BN2TSa1ow8s8wStkvbi7LCoU1JJMAzvM2PwF9TZ/1IO8hAc9Q yWOyEoAuC4Tm2de851SVssuZkF72UdQ3ljfLEMZMqpQf9dOryWfgf0Gf5juPSg1/iAZP UjWLfrObyc9oiPcUuBkIe7WQh9UGShxop5nbJE2y25gbgG2neHCLRsYFOPlV1olsAjSb Ad9ufNJFwjNucucdcnrNPop2Imth+Ko1TS52TcAfZObPCm35qUa7OD101PHugcG4MPMt kw== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3pd56as27b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 19 Mar 2023 01:56:36 +0000 Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 32IN3uhx031062; Sun, 19 Mar 2023 01:56:34 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3pd3raaued-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 19 Mar 2023 01:56:34 +0000 Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 32J1uO5Q014254; Sun, 19 Mar 2023 01:56:34 GMT Received: from mnchrist-mac.us.oracle.com (dhcp-10-154-118-173.vpn.oracle.com [10.154.118.173]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3pd3raauaw-7; Sun, 19 Mar 2023 01:56:33 +0000 From: Mike Christie To: mlombard@redhat.com, martin.petersen@oracle.com, d.bogdanov@yadro.com, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org Cc: Forza , Mike Christie Subject: [PATCH v5 6/9] scsi: target: iscsit: free cmds before session free Date: Sat, 18 Mar 2023 20:56:17 -0500 Message-Id: <20230319015620.96006-7-michael.christie@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230319015620.96006-1-michael.christie@oracle.com> References: <20230319015620.96006-1-michael.christie@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-18_16,2023-03-16_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 malwarescore=0 adultscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303190014 X-Proofpoint-ORIG-GUID: vMX9Aygi-PADMV5VgBL3LdyR0cd3ppbB X-Proofpoint-GUID: vMX9Aygi-PADMV5VgBL3LdyR0cd3ppbB Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org From: Dmitry Bogdanov Commands from recovery entries are freed after its session has been closed. That leads to use-after-free at command free or NPE with such call trace: Time2Retain timer expired for SID: 1, cleaning up iSCSI session. BUG: kernel NULL pointer dereference, address: 0000000000000140 RIP: 0010:sbitmap_queue_clear+0x3a/0xa0 Call Trace: target_release_cmd_kref+0xd1/0x1f0 [target_core_mod] transport_generic_free_cmd+0xd1/0x180 [target_core_mod] iscsit_free_cmd+0x53/0xd0 [iscsi_target_mod] iscsit_free_connection_recovery_entries+0x29d/0x320 [iscsi_target_mod] iscsit_close_session+0x13a/0x140 [iscsi_target_mod] iscsit_check_post_dataout+0x440/0x440 [iscsi_target_mod] call_timer_fn+0x24/0x140 Move cleanup of recovery enrties to before session freeing. Reported-by: Forza Signed-off-by: Dmitry Bogdanov Signed-off-by: Mike Christie Reviewed-by: Maurizio Lombardi --- drivers/target/iscsi/iscsi_target.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 83b007141229..26634dbea9b8 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -4529,6 +4529,9 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep) iscsit_stop_time2retain_timer(sess); spin_unlock_bh(&se_tpg->session_lock); + if (sess->sess_ops->ErrorRecoveryLevel == 2) + iscsit_free_connection_recovery_entries(sess); + /* * transport_deregister_session_configfs() will clear the * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context @@ -4552,9 +4555,6 @@ int iscsit_close_session(struct iscsit_session *sess, bool can_sleep) transport_deregister_session(sess->se_sess); - if (sess->sess_ops->ErrorRecoveryLevel == 2) - iscsit_free_connection_recovery_entries(sess); - iscsit_free_all_ooo_cmdsns(sess); spin_lock_bh(&se_tpg->session_lock);